On July 2, 2008, we entered into an agreement with Willis J.
Johnson, our Chief Executive Officer and a member of our board of directors,
pursuant to which we will acquire 1,500,000 shares of our common stock at a
price of $40.00 per share, or an aggregate purchase price of $60,000,000. The settlement date for the acquisition of
the common stock is expected to be on or about July 11, 2008, and the
purchase will be made pursuant to our existing stock repurchase program. The per share purchase price for the common
stock to be acquired is based on the closing price of our common stock on July 1,
2008 (as reported by The NASDAQ Stock Market), less 5.5% or $2.35. The members of our board of directors had
independent discussions among themselves and agreed in principle to the terms
of this repurchase on July 1, 2008.
On July 2, 2008, this repurchase was formally approved by the
members of our board of directors and the Audit Committee of our board of
directors.

On July 1, 2008, Mr. Johnson filed a notification with the
Securities and Exchange Commission on Form 144, disclosing the intent to
sell 500,000 shares of our common stock unrelated to the repurchase referred to
in the paragraph above. The sale of
these 500,000 shares, which will be accomplished through open market
transactions, will be reported publicly by Mr. Johnson through the
required Form 4 filings with the Securities and Exchange Commission. Assuming Mr. Johnson disposes of all 500,000
shares, he will continue to hold directly or indirectly over 9 million shares
of our common stock.

2

SIGNATURES

Pursuant to the requirements of the Securities
Exchange Act of 1934, the Registrant has duly caused this Report to be signed
on its behalf by the undersigned hereunto duly authorized.